Carbureter.



H. A. MILLER. CARBURETER. APPLIGATION FILED Nov.16,1909.

995,623., i l Patented June 20,y 1911.

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, valve a distance corresponding tothe lift "ora remar orme.

HARRY A. MILLER, OF LOS ANGELES, CALFORNIA.

CARBURETER.

Specification of Letters Patent. Patented Juin@ 2t?, 191ml.,

Application :tiled November 16, 1909. `Serial No. 523,400.

.To all whom 'it may conservar- Be it known that l, HARRY A. MILLER, a

Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Carburetor of a type shown and described in a previous application of mine led January 11, 1909, Serial No.

471,804, in which a series of pivoted wings are arranged around the nozzle and are lifted by the inrushing air during the suction stroke and 'cause the air to .pass in close to Onejof the main objects of the present invention is to cause the lifting movement of thewings to mechanically open the needle of the wings, whereby the amount of gasolene allowed to pass through the nozzle past the ,needle valve is' controlled directly and bears a vdefinite ratio to the amount ofair which passes through the carbureter ,and lifts the win s. l AAnother o ject is to provide for manually re lating the wing operated mechanism for li ting the needle' valve whereby the high speeds of the motor may be adjusted, as it is when the motor isrunning athigh speed that'suction is produced suihciently to raise the wings and control the needle valve in the automatic manner stated.

A further object is to provide for adjusting the carbureter forlow speeds. Thisadjustment is independent of the high speed .adjustment above referred to, the low speed which directl bears against a rod which carries the needle valve and by means of' which gasolene may be allowed to slowly leak past the vneedle 'valve even though the -pivoted wings above referred to do not lift, the small amount of gasolene which4 is vthus permitted to leak past the needle valve being suetient to operate the motor at a "slow s e pA-urther object is to enable the carbureter to be regulated for intermediate speeds.

Other objects and advantages relate to details of construction and operation which will be hrought out in the following specification'.`

Referring-to the drawings: Figure 1 isa vertical longitudinal section through the carbureter on line ml-ml'Fi .v 3. Fig. 2 is a sectional lview., partly in e ovation, of the lower part of the carburetor with the pivclosed they form a circularcentral ori thereby removed. Fig. 3 is a bottom viewV of the carburetor on a reduced scale. Fig. 4 is a plan view of one of the wings. Fig. 5 is a plan view of the valve controlling wing. F ig. 6 is a section on a reduced-scale on line m- Fig. 1. Fig. 7 is a plan view of the ioat valve lever. Fig. 8 is an enlarged section on line ws-s Fig. 1.

1 designates an air passage or mixin chamber which is cylindrical in form wit a Haring lower end 2 the upper end of the mixing chamber being threaded and secured to a neck 3 having a flange 4 which affords means of attaching the 'carbureter to the iuduction pipe not shown. Surrounding the chamberv 1 is a float chamber 5,' the outer wall of whichis 'shown as consisting of a cylindrical glass tube 6, the upper end of which isfclosed by a cap 7 screwed on the wall of the mixing chamber. Within the float chamber 5 is an annular float 8. The cap 7 is provided with a vent 9.

Secured below' the Haring portion 2 of the mixing chamber is a spider comprising four arms 10, 11, 12 and 13,-the outer ends of which are cast integral witha ring 14 which is secured by'screws 15 to a flange 16,- which is cast integral with the lower end of the Haring portion 2, ,the upper edge of the flange 6 being shouldered .to receive the lower edge of the glass tube 6. Fivoted to thering 14 are four wings 17, 18, 19 and 20, oneedge of each of which overlaps the adjacent 'edge of the next wing as clearly shown in Fig. 6. 1When-these wings are ce 21. Projecting up throughthe oriice 21 isa nozzle 22 having an interior passage 23 which communicates with a horizontal passage 24-formed in the arm 13, which is made larger for that purpose, and extend- 'ing up from the passage 24-through the ring 14 isa passage 25 which communicates with the space around the daring portion, 2 1n the lowerpart of the doet valve chamber 5. The passage 24 is formed hy drilling through the side of the ring 14, and the end of the hole is closed by va screw 26.

Cast tothe lower part of the mixing chamber 1, at one side thereof, is a iioat valve chamber 27 which has a lower threadved end 28 with a gasolene inlet passage 29 leading to a valve seat 30.-` By referring to Fig. 3-it will be noted that the threaded exa 'tension 28 is not in line with the screw 26 as might be apparent4 from Fig. 1. The section lme .wt-1.a* in Fig.'3shows the line on which the section is taken, the screw 26 being out of .line with the threaded extension 28. A tubular valve guide 31 extends above the valve chamber 27, and slidable therein is a sleeve 32 which receives a oat valve 33, the sleeve 32 being bored slightly longer than the-valve 33 to permit the latter to loosely lit therein and enable it to take a natural close t with the valve seat 30. The

valve 33 is secured to the sleeve 32 by a pin 34, the pin tightly fitting in the sleeve 32 and loosely fitting in the valve 33' to allow the valve to accommodate itself to its seat fas referred to. A rod 35 extends from the 'upper end of the sleeve 32 through a cap 36 which is screwed on the upper end ofthe guide 31, the rod 35 protruding from the cap 36 and affording a means for manually.`

operating the *float valve 33. A coil-spring 3 lies between the cap 36 and sleeve 32 and serves` to normally move the valve 33 toward its seat' 30.

Within the oat valve, chamber 5 is a notched lug 38 secured by ai'screlw 39f, and: pivoted to the lug 38 is a forked float valve lever 39, Ashown in detail in Fig. 7 the forked ends of which rest against thelower edgeof the float 8, and thevnotched portion 40 bearing upwardly against the lower end' ofthe blade 44. The valve 43 is supported by a looped end-45 on a rod 46, the latter extending through a tube 47 at one side of the nozzle 22 thence downthroughthe arm 13 at one side of the passage 24; Within'the tube 47 is a spring 48`the lower end of which is secured to the rodl 46 and it servesatolnor- -vmally depress rod 46 and close the valve 43.

' vThe arms 10 and 11 each have a'lug 49 bei.; tween which vis pivoted a needle `valve lever "50 in the end of which is a thumb screw 51 whichI bears a ainst the lower end of the rdd 46. The t umb screw 51 is prevented from accidentally turningv b'y a clamping screw 52, the'lever 50 having'a slot 53 vextending from the screw 51, as shown in Fig. 3. The louter end of the lever 50 carries-a roller 54 which bears against a flat' spring 55 whichis'secured to the wing 20 adjacent the pintle thereof.v An arm 56 extends from'the. wing 20"and a thumb .screw57 'passes therethrough and bears'against the flat spring 55.

in well 58 is aclampingscrewlas shown in Fig. 6 Y' for preventin accidental turning .of the thumb screw 5 The roller 54 bears against screw 57 the spring55 may bev raised or Y lowered to 'shift the relative position of the lever 50 whereby a greater or less opening lift of the wing. A A pipe 59 extendsfrom the of the needle valve may be secured at each upper ,part

the mixing chamber l1 to a'point just, above the .cup 42, the upper endfof the pipe communicating with a valve 60. A passage 61- extends from'. the valve- 60 back to the cham-A ber 1 at the point'above the line of the throttle valve 62, whenthe latter is closed as indifcated by. dotted lines Fig. 1.A Thus when the throttle valve 62 is entirely closed suction from the engine. acting through passage 61 and pipe 59 w1ll suck in air which will inspirate gasolenefrom the cup 42 and convey the same directly tothe cylinder which enables the engine -to run at far slower speed with Athe throttle shut. Obviously this speed of running will depend entirely upon the amount of gasolene which is allowed to leak past'the needle valve 43 into the cup 42 andV this adjustment isl obtained-'by the thumb lscrew 51 to raise` or lower the normaliv closed osition of the valve 43.- When the thrott e valve 62 is shut nosuction is' produced within the mixing chamber to lift the wings 2O and thus the needle valve 43 isnot at such time lifd sothat the only asolene which will be supplied to the motor 1s that1 which may be' allowed toescapejn l'small quantities pastthe needle valve. If desiredthe thumb screw "5 1 may be 'lated that the needlefyalve 543 will been- `'tirely closed when the wings20 are down 1n which event, no gasolene is permitted to iiow so reguinto' the -cup 42 and hence therefisnone to he sucked through the pipe 59.' A Thus the adjustment of the '-fcarbureten. for very low speeds is obtained by'means ,ofthescrew 51.

When the throttle valve ,62 is opened the suction of the engine acts to lift the 'wings 17,18; 19 and 20 and the wings-thus collectively. assume an indented cone shape as m- -dicated ini'dotted lines-Fig. larvhich concentrates the inrushing air around the nozzle 22 causing it to pick up gasolene from the cup 42 and mix therewith and pass out through the upper end of the mixing chamber .1. As the wing 20 liftsit acts through its arm 56 andspring 55 .to tilt arm oandthereby 'lift-.thema island needle vene 4.3. The

'amount f lift thus given to the needle valve being in direct proportion to the' amount of lift 'ven to the `byfthe suctionand there y the amountfo gasolenewhlch isadmitted through the nozzle. valve Y1s 'aut-.o matic'ally proportioned ,to the amount au' estesa introduced into and passed through the carbureter.

By adjusting the side screw 57 the lever may be caused to operate a greater .or less distance and thereby correspondingly lift the needle valve 43. As the wing 20 must litt to adm't air when the motor is running at high speeds itis obvious that the high speed adjustment-,is obtained by the screw 5 'llhe ratio of adjustment of the needle valve to the lifting movementl of 'the wings which determines the intermediate speeds may be varied to suit requirements by substituting needle valves 43 of di'erent taper. rl'he valve 60 may be turned to regulate the amount of suction in pipe 59 and amount ot gasolene which is allowed to pass there* through. As shown in Fig. 8 the valve 60 is held against accidental turning by the compression spring 63.

llhat l claim is:

1.- ln a carbureter, a nozzle, a valve for controlling the dow of uel through the 'nozzle, an air passage around the nozzle,

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an automatically variable air inlet controlling means for said air passage comprising a plurality ot pivoted segmental wings, and means operated -by said inlet controlling means to produce a variable ratio ot relative movement between the valve, and said air inlet controlling means.

2. ln a carbureter, a nozzle, a tapered valve, extending downward into the discharge end ot the nozzle in a direction opposed to the discharge ot fuel, means outside the nozzle for supporting the valve, an 'air passag around the nozzle, an automatically vari ble air inlet controlling means tor said air passage comprising a plurality ot pivoted segmental wings, and means operated by said inlet controlling means to impart a corresponding detinite movement to the valve, and means lor regulating the ratio oit movement between said last two elements.

3. ln a carbureter, a nozzle, an air passage around the nozzle, a plurality oi3 over lapping wings pivoted to swing and vary7 the air inlet to the air passage, a valve 'lor controlling the passage ot ituel through thev nozzle, a lever pivoted below said wings and operatively connected with said valve, and means.L on one oil said wings bearing against the lever to tilt the same litt valve when the wings litt.

il. ln a carburetor, a nozzle, an air passage around the nozzle, a plurality ot overlapping wings ypivoted to swing and vary the air inlet to the air passage, a valve tor controlling the passage et luel through the nozzle, a lever pivotedxbelow said wings and operatively connected with said valve, a flat spring on one of said wings, a screw in said wing engaging the end of the spring I to adjust the same, and a roller on said lever bearing against the spring.

5. ln a carbureter, a nozzle, an air passage around the nozzle, a plurality ot overlapping wings pivoted to swing and vary the air inlet to the air passage, a valve for controlling the. passage ot fuel through the nozzle, a rod extending Valong-.the nozzle and connectedto the valve, a lever pivoted below said wings, a. screw in said lever bearing against said rod, and means on one ot said wings bearing against said lever .to tilt the saine and litt the rod and valve when the wings lift.

6. lln a carburetor, a nozzle tor gasolene, an air passage around the same, a valve it'or closing the air passage above the nozzle, and means for concentrating suction on a. small area at the mouth-ot the nozzle for lifting gasolene with a slight amount ot air troni thenozzle and conducting the saine past said valve when the latter is closed.

7. lln a carbureter, "a nozzle and needle valve, an air passage around the nozzle, a throttle valve for closing the passage above the nozzle, a-pipe independent of the nozzle' and needle valve extending past the throttle valve and connecting with the passage above and below the valve, the lower'end of said pipe being close to thevmouth ot the nozzle,

and a valve for .controlling the passage ot.

gasolene and airthrugh said pipe.`

8. ln a carbureter, a nozzle', an air passage around the nozzle, a throttle valve 'lor closing the passage above the nozzle, and a pipe extending past the throttle valve and connecting with the passage above and below the valve` the lower endet-said pipe being close to 'the mouth ol the nozzle, and a cup on the mouth ot the nozzle tor holding a small amount ot gasolene.

9., ln a caroureter, a nozzle, an air passagearound the nozzle, a 'throttle valve lor closing the passage above the nozzle, and a pipe extending past the throttle valve and connecting with the passage above and below the valve, the lower end ot said pipe being close to the mouth ol the nozzle, and a valve in said pipe operable outside the air chamber.

ln testimony whereot, l have hereunto set my hand 'llos ngeles, California, this Qd'day ot @ctober i909.

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